Cold water resistant starch-based adhesive containing styrene-maleic anhydride resin and fixed alkali
AssigneeNational Starch and Chemical Corporation
InventorsJulius Sirota, Matthew P. McKenna, Jr.
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Abstract
A cold water resistant adhesive composition is disclosed which exhibits an optimum balance of cold water resistance and removability when employed for labeling of bottles which will be used under conditions of extreme humidity. The adhesive comprises a mixture of starch, styrene-maleic anhydride resin, peptizer, water and sufficient alkali to obtain a pH of 8.0 to 11.0 with at least 20% of the alkali present in the form of a "fixed alkali".
Claims8
A cold water resistant adhesive composition comprising a mixture of starch, at least one styrene maleic anhydride copolymer having a styrene to maleic anhydride ratio of 1:1 to 3:1, a peptizer, water and sufficient alkali to give a pH within the range of 8.0 to 11.0 with at least 20% of the total alkali, on a stoichiometric equivalent basis, of a 100% fixed alkali product, employed in the form of a fixed alkali, said composition containing 4.8 to 20.0 parts sytrene maleic anhydride per 100 parts starch.
Dependencies are inferred from the claim text.